Dual-facing machine for corrugated paper-board.



J. N. HAHN. DUAL FACINGNIACHINE FOR CORRUGATED PAPER BARU A'PPLlcATloNFILED JUNE 21. :913.-nrNiwzn APR. 19.1911.

Patented June 5, 1917,.

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N. HAHN.

DUAL FACING MACHINE FOR CORRUGATED PAPER BOARD.

APPLICATION FILED JUNEZ |.9l3 RENEWED APR. i9, 1917. mmm.

Fatented June 5, 19W.

1. N. HAHN. l DUAL FACING MACHINE FOR CORRUGATED PAPER BOARD.

APPLICATION FILED 1UNE27, 1913. RENEWED APR. 19,1917.

Patented June 5, 1917.

w i u w w 4 m W l. N. HAHN.

DUAL PAclNG MACHINE FOR CORRUGATED PAPER BOARD.

APPLICATION FILED JUNE 2?. 1913. RENEWED APR.19.1911.

L @SAS., Patentedlune 5, 19W.

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DUAL-FACING MCHINE FOR CORRUGATED PAPER-BOARD. I

assenso.

Specicati'on of Letters Patent.

Patented une 5, 191W.

Application le ltime 27, 1913, Serial No. 776,118. Renewed April 19,1917. Serial No. 163,312.

To all 'whom t may concern Be it known that l, JOHN N. HAHN, citif zenof the United States, residing atiCleve- 'for Corrugated Paper-Board, ofwhich the following is a specication.

|llhis invention has reference to a dual facing machine for corrugatedpaper-board, all substantially as shown and described and particularlypointed out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of themachine but broken out between its ends as the machine is ofconsiderable length.

Fig. 2 is a longitudinal sectional elevation l of the machine. Fig. 3 isa cross section of till the machine with the heater at the right.l

Fig. 4 s an elevation of ting rolls.

Figs. 5 and 6 are cross sections of the bearings for the upper and lowercarrying and the scoring and slitf pressing roll respectively, seen alsoin cross section Fig. 2 and intervening the drums at the respective endswhich carry the endless aprons. Fig. 7 is a plan 0f a portion ofy alower roll and its bearing, and Fig. 8 is a plan of two upper rolls andtheir bearings. Fig. 9 is a side elevation of sections of upper andlower rolls and their bearings, and

Fig. l() is a side elevation of a portion of the upper and lower framesand the rollers and bearings therefor in said frames.

The object of the machine as disclosed in the foregoing views is to maketwo independent corrugated paper boards in one and the same operationand to complete said boards for the market.

rlhe machine 1s necessarily one of eXceptional length as it is built tomanufacture and dry the boards and to cut the same into commercial sizesin a continuous 'operatiom and comprises a main frame F in which all theworking parts except the final creasing and cutting rolls are mounted.rlhe machine receives the two boards from the pasting and combiningmechanism in a green or undried state, and the several sheetsconstituting the board indicated by a, b, c and (Z, respectively, enterthe apparatus, shown in" Figs. l and 2 from the tail, in superimposedrelations, the sheet c being pasted on board a and sheet d pasted onsheet b, it -becomplete boards faced each upon both sides and ready tobe suitably pressed and dried to edectually secure the sheets c and d.

Now, having the boards thus initially made they are in condition forcompletion of manufacture and reduction to commercial units, and to thisend the said boards, designated as a and b, enter the drying andpressing machine comprised within the frame F, Figs. l, 2 and 3apparently as one board but in fact as two separate boards with greenfacings on both outsides. Having entered the machine F the` said boardsare subjected to a mutually and evenly sustained pressure between thetwo endless aprons or belts m and n running over the respective drums gand g and It and L at the ends of the machine and which belts or apronsare under pressure `between the two series of rolls 5 and 6. These rollsare more or less disclosed in detail in Figs. 7 to 10, and the lowerrolls 6 are in stationary bearings 7 while the upper'rolls 5 are inmovable bearings; 8 confined between the side lianges 10 of brackets 9.The said brackets 9 are bolted to the angle iron side bars l2constituting a portion of the main frame F and the bearings 7 are boltedto angle iron side bars or rails 13 likewise constituting a portion ofthe said frame F.

` The upper roller bearings 8 have up and down play between the saidflanges 10 of brackets 9 according to the thickness of the stock passingthrough between the same and t5 ing understood that `each board a and Byproviding automatic play for the up 1in lll The endless aprons m and nrun over the drums at the ends of the machine and also overtake-uprollers and 16,- respectively, located in the middle of the machine,Fig. 1. The said take-up rollers are in pairs, two for each belt orapron, and have bearings 18 slida'bly mounted upon parallel bars 19constituting portions of the supporting frame work and controlled byscrew rods 20, which pass through fixed cross pieces 21 and have nuts 22behind said cross pieces to fix the adjustments. Either or both of saidrollers for each belt can be adjusted to take up the slack in the beltas may seem desirable, the tension on the said belts being materialy inconnection with the free moving top. rollers 5 in determining theirjoint effect upon the workcarried between the said parts and in whichthe two aprons travel in the same direction and at identically the samerate of speed. Driving mechanism of gears as shown for said rollers isemployed in this insta-nce but any equivalent means may be employed toactuate the said drums.

Having reference now to the means for drying the material, it is to beobserved that the rolls and endless aprons for carrying the material areinclosed within a chamber having a suitable wall lw which isco-eXtensive with the machine frame F and constructed to confine theheat within. A steam heating system is installed with a steam pipe line`30, Fig. 5,`.which receives live steam from a boiler or other source anddelivers the same to the heating coils or pipes 31 and their headers 32,Figs. 2 and 5. The waste or exhaust'steam from these pipes is carried bythe waste pipe 33 to the air heating chamber 34. Only exhaust steamvis`employed in this chamber and the air heated thereby is carried by hotair pipe' 35 to a longitudinally disposed tube 36 on one side of themachine and which tube is desi ned to b'e co-extensive with the machineor a out as long as the space between the front and rear drums andincluding the space occupied by the two sets of rollers 5 and 6. ln

the present construction however, l show the tube 36 divided at themiddle and a supply pipe 35 for each subdivision.

The said tube 36 is a supply tube for heated air adapted to -be blownthrough the corrugations of the boards mand b by the force of blower 38,and the said corrugations run transversely of the board and are more orless open from edge to edge ot the board, so that with the rightconditions being maintained the heated air from tube 3G presumably willbe forced through said corrugations.

rllhis particular step in the heating and drying of thesaid'corrugations is of course supplemental to the heating and dryingimparted by the steam coils 31, and the said tube 36 has a longitudinalduct -37 along its inside which discharges directly into the vspacebetween the-edges ofbelts m and a and against` the corresponding edgesof the intervening boards a and 1),.F'ig. 5.

The rotary blower 38 forces the heated air into and through the saidtube 36 at such pressure as to also drive the air through the said slotinto the corrugations of boards a and b to the opposite side, but as amatter oi' 'fact this action is only measurably successful, even with ahigh pressure by the said blower, owing to the 'comparatively slnallsize of the corrugated passages and the friction encountered, and henceis supplemented by a corresponding suction or exhaust through fan 40 andits pipe 41 connecting` with exhaust tube 42. Said tube 42, like uponthe other side and which proceeds in! itially from blower 38, asdescribed. The exhaust air is drawn off by fan or suction device 40through pipe or pipes 41, Two or more such pipes or -flues may beemployed in this instance and go alike to tan 40.

lt will thus be seen that the means provided for reaching the boards aand Z) with a volume of heated air in addition to their exposure in thedrying chamber ot the machine to heat from the steam pipes 31 involvesboth the forcing of the air under a suitable pressure through the tube36 and its duct 37 into the corrugations of the boards a and b and thesuction or exhaust of the air by the appliances operating from thelother side of the machine. That is, a direct travel or movement of theheated air is established through the corrugations ot the said boardsand when once used is discharged into the open air by the exhaust fan'40. Furthermore, l have found it both adthat the hot air is notdischarged into ther drying chamber ot' the machine las in my patentabove referred to, butdirectly into Lazaaso the corrugations of theboards, and the duct 37 is purposely provided with Hat sides and lappedwithin the edges of the aprons m and n to cut off air communication withY the drying chamber as such and compel the heated air to traverse theboard corrugations. On the other side the suction duct 4:3 does not lapover the edges of the aprons m and n and there is'room for a measure ofsuction to take place from within the drying chamber but the .main e'ectand function is to cooperate with the blast driven into the boards andto carry away the moisture laden air.

Returning now to the take-up rollers and 16 it will be seen that thesaid rollers are carried by the bearings 18 which are slidably mountedin the parallel bars 12, 13 and -19 and the outer bars or rails of themain frame F to top and bottom. The

l screws 20 in each case have such length as will accommodate themaximum adjustment required in the prolonged use of the belts m and n..Owing to the length of these machines and the unavoidable stretch of thebelt a take-up of from six to ten feet or more has to be provided for,and for this reason the two reversely-adjustable take-up rollers arerequired for each belt. rlhese rollers are disposedv at the middle ofthe machine and in the return portion of the belt so that the workingportion thereof may be duly stretched and run straight over therespective rollers 5 and 6. Adjustment in any case is edected by thenuts 227 and the screws 20 j have heads embedded in the bearing blocks18, Fig. 1. r

Respecting the use of air pressure and exhaust as provided for herein tocarry a drying current of air through the corrugations of the boards ait is important to state that the means employed for this purpose assetA forth in my patent above cited were found utterly inadequate andinoperative because the air became so heavily laden with moisture thatit ceased to be edective for evaporating purposes. In fact the entirescheme was found impracticable and hence the pres-- ent arrangementwhichprovides for a constant intake of fresh air heated to a fairly hightemperature and a suction and exhaust line for the used air entirelyinde-y pendent of the air pressure, whereby the heated air is used onlyonce and discharged. This method of handling the air is highlysatisfactory and elicient.

In Figs. 6 to 10 inclusive I show constructions following after theboard making mechanism hereinbefore described and comprising the enddrums g and h between which the boards are carried forward, first, tothe spiral cutting knives 50 and then to the intermediate friction rolls51 and next to the trimming and creasing disk or devices 52 and 58respectively mounted on the same shaft 54, and from which point I theboard goes to the receiving table 55.

"What l claim is:

1. ln a machine for facing corrugated paper board, a main frame and aset of parallel bars within each side thereof and one above the other, aseries of carrying rolls having fixed bearings in the lower set of saidbars, and a series of presser rolls having independent verticallyslidable bearings for said rolls and side guides for said bearings fixedon the upper set of said bars, in combination with two endless apronsmounted to travel in the same direction between said rolls.

2. In a machine for facing corrugated paper boards, a drying chamber andtwo endless aprons mounted therein one above the other and carryingrolls and presser rolls in series having said aprons running Vaprons arestretched, in combination with hot air pressure devices comprising atube lengthwise on the side of the machine having a duct lengthwisearranged to discharge between the adjacent edges of said aprons andmeans to force heated air through said tube and duct.

4. A machine for facing corrugated paper board having two endless apronsand means to carry the same in parallel relations, in combination with ahot air supply system comprising a tube lengthwise substantiallyopposite the said aprons, a duct through which the air is dischargedbetween said aprons and a blower and pipes leading to said tube toprovide hot air pressure therein.

5. A machine for facing corrugated paper board having aidrying chamber,a pair of board actuating belts in said chamber and rollers betweenwhich said belts are adapted to travel and engage said boards, incombination with steam heating coils in said chamber beneath saidaprons, a tube lengthwise of the machine outside thereof and a ductleading therefrom into the space between the adjacent edge of saidaprons.

6. A machine for facing corrugated paper board having a drying chamberand two endless aprons stretched therein to carry thev iis ing heatingpipes adapted to utilize the exhaust steam from saidlive steam pipes, atube lengthwise outside said drying chamber coupled up with said airheater to receive hot air therefrom, a blower to force the air forwardinto said tube and a duct from said tube .discharging into the spacebetween the said .aprons next within said tube.

7. A machine for facing corrugated paper board having a drying chamberand a pair of endless aprons arranged to receive the board between them,in combination with a an exhaust fan in suction relations with saidlongitudinal tube.

8. A machine for facing corrugated paper board having two endless apronsadapted to receive the boards between them, drums carrying the saidaprons and a pairof takeup rollers for each apron adapted to be adjustedin opposite directions to take up the slack therein. 9. A machine forfacing corrugated paper board having endless aprons and a pair oftake-up rollers for each apron arranged to be oppositely adjusted, aframe in which the bearings for said rollers are slidably mounted andscrew rods on said bearings to adjust the same.

JOHN N. HAHN.

Witnesses:

E. M. FISHER, H. T. FISHER.

